Nickelodeon/MTVN sites already attract 20 million game players monthly in the U.S. alone, according to Media Metrix. Nickelodeon/MTVN Kids and Family Group vp of Digital Media Steve Youngwood suggested the new titles could help drive that number.

"Some of the games -- for sites such as Shockwave, Addicting Games and Neopets -- are Web original properties," he added. "But some are based on TV properties, which provide great ways for users to interact with those brands."

This new expansion, part of a recent $100 million investment in the casual-gaming space, will bring the total number of games available across the sites to more than 6,000.

In addition, Nickelodeon/MTVN will also soon provide tools so that site visitors can design and build their own games and Nickelodeon's mobile web service, wap.nick.com, will add 20 new titles this year.

The company is also planning to launch up to 12 new downloadable titles this year, following the recent successful release of "SpongeBob SquarePants Underpants Slam" for Xbox Live Arcade.

"This is all about casual gaming and our commitment is only increasing," Youngwood noted. "Going back to our own sites such as Nick.com, as well as acquisitions we made such as Neopets, Shockwave and Addicting Games, we found that be relevant to this audience online, you have to be a major player in casual games."